/*
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

export const hashStringToCode = (str: string): number => {
  let hash = 0;
  if (str.length === 0) {
    return hash;
  }
  for (let i = 0; i < str.length; i++) {
    const char = str.charCodeAt(i);
    // eslint-disable-next-line no-bitwise
    hash = (hash << 5) - hash + char;
    // eslint-disable-next-line no-bitwise
    hash = hash & hash; // Convert to 32bit integer
  }
  return hash;
};

class StringService {
  hashCode(str) {
    return hashStringToCode(str);
  }
}

export default StringService;
